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When to use Straight-Through cable and when to use Crossover cable

January 10, 2012 Bogdan No comments

Devices Connected with Crossover and Straight-Through cables

On the left hand side are devices that use straight-through cable and on the right hand side are devices that use crossover cable.
These are the devices that use a straight-through cable:

Switch – Router
Switch – PC
Switch – Server
Hub – PC
Hub – Server

These are the devices that use a crossover cable:

Switch – Switch
Switch – Hub
Hub – Hub
Router – Router
Router – PC
Router – Server
PC – PC

But nowadays this standard is becoming obsolete due to the fact that Auto-MDIX (automatic medium-dependent interface crossover) technology let devices to choose between port signals. This means that you don’t need to know anymore what type of cable you must use when connecting two devices.

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